CITIZEN CT-S4000L - Manual (Page 21)

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CAUTION!
■ Do not touch the surface of the heating element of the print head by bare hand or
metal.
■ Wipe the dust off the surface of the platen periodically with a cotton swab moistened
with ethyl alcohol. Especially, when full cutting is used for label paper, paper dust may
adhere on the platen depending on the property of liner sheet, roll paper diameter,
environmental condition of using the printer, etc.
Print (thermal) head
4.3 Periodic cleaning
If the print head or platen is dirty, clear printing is not available or fault may occur. If
paper dust or the like is present on the sensor protection sheet, label paper or blackmark
paper may not be detected correctly. Periodic cleaning in accordance with the following
procedure is recommended.
1. Turn the printer power off.
2. Open the printer cover.
3. Wait several minutes. Wipe off any debris on the heating element of the
head using a cotton swab soaked in ethyl alcohol.Just after printing, high
temperature remains in the print (thermal) head. Be careful not to touch it by
hand.
4. Moisten the tip of the cotton swab with water and wipe the dirt on the surface
of the sensor protection sheet. Avoid using solvent such as alcohol. Use of
it may result in smoky sensor protection sheet.
Platen
Sensor
Sensor